Enum rustc_errors::DiagnosticMessage

pub enum DiagnosticMessage {
    Str(Cow<'static, str>),
    Translated(Cow<'static, str>),
    FluentIdentifier(Cow<'static, str>, Option<Cow<'static, str>>),
}

Abstraction over a message in a diagnostic to support both translatable and non-translatable diagnostic messages.

Intended to be removed once diagnostics are entirely translatable.

Variants

Str(Cow<'static, str>)

Non-translatable diagnostic message.

Translated(Cow<'static, str>)

Translatable message which has been already translated.

Some diagnostics have repeated subdiagnostics where the same interpolated variables would be instantiated multiple times with different values. These subdiagnostics’ messages are translated when they are added to the parent diagnostic, producing this variant of DiagnosticMessage.

FluentIdentifier(Cow<'static, str>, Option<Cow<'static, str>>)

Identifier for a Fluent message (with optional attribute) corresponding to the diagnostic message. Yet to be translated.

https://projectfluent.org/fluent/guide/hello.html https://projectfluent.org/fluent/guide/attributes.html

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 48 bytes

Size for each variant:

• Str: 32 bytes
• Translated: 32 bytes
• FluentIdentifier: 48 bytes